Ignition System Trouble Diagnosis. Trouble Shooting Ignition System Failure of an engine to start could be due to a fuel system problem which we will.

Slides:



Advertisements
Similar presentations
IGNITION SYSTEM SERVICE
Advertisements

Systems Review 1 ATC Chapter 4.
Engine Tune-Up By Jonathan Rollins.
PHSAUTOMOTIVESALSPHSAUTOMOTIVESALS TROUBLE SHOOTING A NO START CAR.
Regional Gliding School Problems With The Fuel System n Very rapid and violent burning of the fuel in the cylinder. n Causes overheating and damage.
Motor number located on the clutch housing.
Engine Maintenance Chapter 10 Emergency Repairs Afloat.
Performance engine preparation Tumble & swirl Tumble = In-cylinder air motion in “4-valve” heads Swirl = In-cylinder air motion in “2-valve” heads.
Spark Plugs Topics covered in this presentation: Spark Plug Construction Spark Plug Reach, Seating and Heat Range Spark Plug Servicing.
BASIC ENGINE TESTING.
11/2001VHS Auto1 Point type Ignition Flow Chart Auto 2 Trouble Shooting.
SPARK PLUGS PURPOSE Ignite the air fuel mixture in the cylinder to produce power. Ignite the air fuel mixture in the cylinder to produce power.
Columbia Basin College
PISTON ENGINES Part 6 Piston Engine Operations (Ignition)
Engine Systems and Components
IGNITION SYSTEM SERVICE. TESTING AND REPAIR l Evaluate the symptoms –Narrow down possibilities l Pinpoint to a specific engine system –Compression –Fuel.
Systems of the Engine.
Ignition System. 1. Describe the primary circuit in an ignition system: -Battery -Ignition switch -Ballast resistor -Primary windings in coil -Points.
Engine Tune-Up.
© 2012 Delmar, Cengage Learning Ignition System Service Chapter 38.
Preventative Maintenance & Troubleshooting
Four- Stroke Small Engines
Small Engine Troubleshooting Colquitt County Young Farmers August 31, 2006 Edited by CTAE Resource Network February 2011.
I.C. ENGINES Practical No: 1 (17 Mar, 2014). Measurement of Cylinder Pressure If your vehicle has been running roughly or losing power, there may be a.
Measuring Engine Components and Specifications
Troubleshooting Small Engine Systems Jason Spurlin 4/10/02 Virginia Tech Edited by the CTAE Resource Network February 2011.
Unit A 6-3 Mechanical Systems and Technology. Problem Area 6 Agricultural Power Systems.
© 2012 Delmar, Cengage Learning Diagnosing Engine Performance Problems Chapter 48.
+ The Four Stroke Cycle By Elizabeth Fahey. + Outline Time Required: 1-3 classes Grades: 9-12 Background: Lesson is in conjunction with the small engine.
Advanced Engine Performance Diagnosis, Fourth Edition James D. Halderman Copyright ©2009 by Pearson Higher Education, Inc. Upper Saddle River, New Jersey.
Automotive Fuel and Emissions Control Systems 3/e By James D. Halderman Copyright © 2012, 2009, 2006 Pearson Education, Inc., Upper Saddle River, NJ
Ag Science and Tech Small Gas Engines.
52 RCACS Ground School Engines PO 407 EO 4 “Fuel Problems, Ignition, and Basic Electrical System”
Spark Plug Air Cleaner Internal Combustion Engine Review.
Small Engines Compression System. Compression System Components Function – Components direct, contain, and compress the air-fuel mixture, and then discharge.
High Voltage Components.  Understand the parts and operation of spark plugs  Understand the Kill Switch  How to identify spark plugs.
Engine Diagnostic Tests
Auto Mechanics Tools Piston Ring Compressor.
Engine Disassembly manual. Oil plugs/ 10 mm wrench.
Automotive Engines: Theory and Servicing, 7/e By James D. Halderman Copyright © 2011, 2009, 2005, 2001, 1997 Pearson Education, Inc., Upper Saddle River,
Engine Technology Engine Diagnostic its requires an understanding of the fundamentals & a systematic approach to determine what the problem is. If the.
Ignition System An ignition system is a system for igniting a fuel-air mixture. Ignition systems are well known in the field of internal combustion engines.
Checking Engine Compression Lab # 4. Checking Engine Compression As we learned earlier in the course four stroke gasoline engines develop compression.
Small Engine Troubleshooting Colquitt County Young Farmers August 31, 2006 Revised May 2007.
Small Engine Ignition Systems
Engine Mechanical Diagnostics 1. 2 Introduction To Diagnosis.
Columbia Basin College
IGNITION SYSTEMS.
Internal Combustion Engines
Diagnosing & Repair Late model vehicles (OBD II) can be checked with the scan tool for the following problems: Crankshaft Position Sensor Crankshaft Speed.
34 Chapter Small Engine Performance, Maintenance, and Troubleshooting.
Ignition Systems Chapter 9: Part 2.
Aircraft Ignition system
Engine Compression Testing
2.4 Maintaining activator of agricultural machine appliance
Small Engine Troubleshooting
Piston Integrated Circumferential Spark Ignition(PICSI)
Start…..
Ignition Systems Overview
Essential Tips to Perform Ignition System Checks.
What are the Basic Causes of Leaks in Car Spark Plug Tubes
Reasons Behind Engine Backfiring in Cars
Engine Systems Parts Review.
Autotronic 2 Prepared by: Norhani Bte Mohd Jaffar
Small Engine Ignition Systems
Cooling system problems
Diagnosing Engine Problems
Presentation transcript:

Ignition System Trouble Diagnosis

Trouble Shooting Ignition System Failure of an engine to start could be due to a fuel system problem which we will be discussing next, but it could also be an ignition problem. In trouble shooting your ignition system use the following steps in determining your problem;

Trouble Shooting Ignition System Ensure the engine on – off switch is turned to the off position Observe the engine for normal compression (crank it) you should be able to determine a compression problem by feel. If the engine turns over unusually fast or long, you can suspect a loss of compression

Trouble Shooting Ignition System If your engine has a major compression loss it is probably due to worn bearings, scored cylinder walls or pistons, or broken rings or other parts If your engine has normal compression then the next step is to check the ignition

Remove and examine your spark plug for evidence of ; Trouble Shooting Ignition System cracked insulator worn electrodes carbon deposits

Trouble Shooting Ignition System Clean and or replace defective spark plug Set plugs’ air gap Check engine for spark using a spark tester or the bolt method If no spark occurs the fault could be worn or dirty contact points, points out of adjustment, a defective capacitor, high tension lead, on-off switch, or magneto coil

Trouble Shooting Ignition System If spark appears using the spark tester but the engine still fails to start then check the plug itself to see if it can deliver the spark Remove the plug, reattach it to the high tension lead and lay it or hold it against cylinder head while cranking the engine to see if the spark jumps the gap. If it does not then the plug is probably bad and should be re- examined for cracks, black sooty deposits on the porcelain or electrodes, burned electrodes, or too wide a gap

Trouble Shooting Ignition System One other thing to look for with regard to a spark plug that has just been removed from an engine that has been cranked but failed to start is the presence of fuel. If one end of the plug is wet that means that fuel has probably been delivered to the combustion chamber. You can also put your finger over the spark plug hole and crank the engine. If your finger gets wet (gas) it also tells you that fuel is being delivered

Trouble Shooting Ignition System If spark is delivered and all of our other tests prove to be okay then your problem is most likely elsewhere

Ignition System Trouble Diagnosis